Influence of the oxide support reducibility on the CO2 methanation over Ru-based catalysts

Dreyer, Jochen A.H.; Li, Peixin; Zhang, Linghai; Beh, Gein Khai; Zhang, Runduo; Sit, Patrick H.‐L.; Teoh, Wey Yang

doi:10.1016/j.apcatb.2017.08.011

Cited by 205 publications

(93 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of reduced ceria (Ce 3+ ) is necessary to initiate the reaction, and based on the observation reported in this work it changes drastically the picture with respect to Ru on alumina support, on which CO 2 chemisorption gives rise to the formation of bicarbonates. In agreement with this work, the evolution of formates on Ru/CeO 2 and bicarbonates on Ru/Al 2 O 3 has been observed also by Dreyer et al (2017). A different situation is described by Sharma et al, who observe the formation of carbonate species on a Ru-substituted ceria catalyst by in situ DRIFT (Sharma et al, 2016).…”

Section: Co2 Methanation Reactionsupporting

confidence: 92%

“…Ceria-based catalysts have been found to possess higher activity and selectivity to methane with respect to other oxides for the methanation of carbon dioxide (Das and Deo, 2012; Tada et al, 2012; Atzori et al, 2017; Diez-Ramirez et al, 2017; Dreyer et al, 2017; Fukuhara et al, 2017; Martin et al, 2017; Li M. et al, 2018). The investigation of CO 2 methanation on ceria-based materials dates back to the 90's, when firstly significant differences in this reaction between ceria and other supports were described (Trovarelli et al, 1991; de Leitenburg and Trovarelli, 1995).…”

Section: Co2 Methanation Reactionmentioning

confidence: 99%

“…More recent studies revealed that indeed oxygen vacancies and ceria reducibility play an important role for CO 2 hydrogenation to methane on metal-ceria systems, irrespective of the metal (Sharma et al, 2011, 2016; Tada et al, 2012; Upham et al, 2015; Wang et al, 2015; Wang F. et al, 2016; Zhou et al, 2016; Diez-Ramirez et al, 2017; Dreyer et al, 2017; Bian et al, in press). Wang et al compared the activity of Ru supported on ceria nanocubes (NC), nanorods (NR), and nanopolyhedra exposing different facets for CO 2 methanation (Wang et al, 2015).…”

Section: Co2 Methanation Reactionmentioning

confidence: 99%

See 2 more Smart Citations

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

View full text Add to dashboard Cite

Reducing greenhouse emissions is of vital importance to tackle the climate changes and to decrease the carbon footprint of modern societies. Today there are several technologies that can be applied for this goal and especially there is a growing interest in all the processes dedicated to manage CO 2 emissions. CO 2 can be captured, stored or reused as carbon source to produce chemicals and fuels through catalytic technologies. This study reviews the use of ceria based catalysts in some important CO 2 valorization processes such as the methanation reaction and methane dry-reforming. We analyzed the state of the art with the aim of highlighting the distinctive role of ceria in these reactions. The presence of cerium based oxides generally allows to obtain a strong metal-support interaction with beneficial effects on the dispersion of active metal phases, on the selectivity and durability of the catalysts. Moreover, it introduces different functionalities such as redox and acid-base centers offering versatility of approaches in designing and engineering more powerful formulations for the catalytic valorization of CO 2 to fuels.

show abstract

Section: Co2 Methanation Reactionsupporting

confidence: 92%

Section: Co2 Methanation Reactionmentioning

confidence: 99%

Section: Co2 Methanation Reactionmentioning

confidence: 99%

See 1 more Smart Citation

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

2019

View full text Add to dashboard Cite

show abstract

“…Flame synthesis is widely used to manufacture functional metal oxide nanoparticles for applications including thermochemical analysis, chemical sensing, photocatalysis, and electrocatalysis 1,2. The advantages over other synthesis techniques are that the nanoparticles can be prepared through a one-step process3,4 and that the high temperature gradients inside the flame facilitate the formation of particles with unique properties 5. One such material that is frequently encountered in the field of flame synthesis is titanium dioxide.…”

Section: Introductionmentioning

confidence: 99%

Polymorphism of nanocrystalline TiO₂ prepared in a stagnation flame: formation of the TiO₂-II phase

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Despite the Sabatier reaction is exothermic, it has kinetic restrictions due to the high stability of the reactant gases, and a catalyst is necessary to accelerate the reaction until rates with practical relevance for industrial application. Several active phases have been studied, including ruthenium, [21][22][23][24][25][26][27][28] palladium, [29][30][31] rhodium [32][33][34][35] and nickel. [36][37][38][39][40][41][42] Noble metal catalysts are able to operate at lower temperature than nickel catalysts, but the prize of noble metals is much higher and nickel catalysts are a promising option for mild temperature.…”

Section: Introductionmentioning

confidence: 99%

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation

et al. 2018

View full text Add to dashboard Cite

The effect of the LnOx support has been studied for Ni‐based CO2 methanation catalysts. 10 wt.% nickel catalysts with LaOx, CeO2 and PrOx supports have been prepared, characterized by N2 adsorption, XRD, XRF, TG‐MS (N2‐TPD and H2‐TPR) and XPS, and have been tested for CO2 methanation. The catalytic activity follows the trend Ni/CeO2>Ni/PrOx≫Ni/LaOx, all catalysts being very selective towards CH4 formation. The activity depends both on the nature of the catalytic active sites and on the stability of the surface CO2 and H2O species. Ni/CeO2 is the most active catalyst because (i) the Ni2+‐ceria interaction leads to the formation of the highest population of active sites for CO2 dissociation, (ii) the reduced Ni0 sites where H2 dissociation takes place are the most electronegative and active, and (iii) the stability of surface CO2 and H2O species is lowest. Ni/LaOx achieves lower activity because of the strong chemisorption of H2O and CO2, which poison the catalyst surface, and because this support is not able to promote the formation of highly active sites for CO2 and H2 dissociation. The behavior of Ni/PrOx is intermediate, being slightly lower to that of Ni/CeO2 because the formation of active sites is not so efficient and because the stability of chemisorbed CO2 is slightly higher.

show abstract

Influence of the oxide support reducibility on the CO2 methanation over Ru-based catalysts

Cited by 205 publications

References 72 publications

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Polymorphism of nanocrystalline TiO₂ prepared in a stagnation flame: formation of the TiO₂-II phase

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation

Contact Info

Product

Resources

About

Influence of the oxide support reducibility on the CO2 methanation over Ru-based catalysts

Cited by 205 publications

References 72 publications

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Ceria-Based Materials in Hydrogenation and Reforming Reactions for CO2 Valorization

Polymorphism of nanocrystalline TiO2 prepared in a stagnation flame: formation of the TiO2-II phase

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO2 Methanation

Contact Info

Product

Resources

About

Polymorphism of nanocrystalline TiO₂ prepared in a stagnation flame: formation of the TiO₂-II phase

Ni/LnOx Catalysts (Ln=La, Ce or Pr) for CO₂ Methanation